Condensation prevention type transmission window for CMS module test chamber

Abstract

The present invention is related to a condensation prevention type transmission window for a CMS module test chamber, the transmission window being provided at the module test chamber. The condensation prevention type transmission window includes: a multilayer glass panel in which heating wires are coated on upper, lower, left, and right side surfaces thereof; and an air injector provided at each of opposite surfaces of the transmission window to inject air from an upper side edge and/or a lower side edge of the transmission window and to form an air curtain. The present invention provides the condensation prevention type transmission window for a CMS module test chamber, which prevents freezing and fogging on inside and outside surfaces of the transmission window of the CMS module test chamber varying in a temperature range from 40° C. to +125° C.

What is claimed is: 
     
       1. A condensation prevention type transmission window for a camera monitor system module test chamber, the transmission window being provided at the module test chamber, wherein the transmission window comprises:
 a multilayer glass panel in which heating wires are provided on upper, lower, left, and right side surfaces thereof, 
 wherein the transmission window is coupled with an air injector to form an air curtain on the transmission window, 
 wherein the air injector comprises;
 an upper air injection pipe provided at an upper side edge of the transmission window and having a nozzle for injecting air toward a lower side of the transmission window; 
 a lower air injection pipe provided at a lower side edge of the transmission window and having a nozzle for injecting air toward an upper side of the transmission window; and 
 a flow path selection control valve provided at a branching point on a main air flow path for distributing air into the upper air injection pipe and the lower air injection pipe, 
 
 wherein the flow path selection control valve is controlled on the basis of temperature of air contacting with the transmission window, such that when the temperature is low, air is injected from the lower air injection pipe, and when the temperature is high, air is injected from the upper air injection pipe, so the air curtain is spread out on the transmission window. 
 
     
     
       2. The condensation prevention type transmission window of  claim 1 , further comprising:
 a temperature sensor provided at each of opposite sides of the transmission window to sense temperature; and 
 a controller receiving sensing information of the temperature sensor and outputting a path switching command to the flow path selection control valve, 
 wherein an air injection flow path is automatically selected by the flow path selection control valve on the basis of temperatures of air contacting with the opposite surfaces of the transmission window, and air injectors on the opposite surfaces are individually controlled from each other on the basis of the temperatures of air contacting with the opposite surfaces of the transmission window. 
 
     
     
       3. The condensation prevention type transmission window of  claim 2 , further comprising:
 a heating wire current control circuit configured to control heating temperatures of the heating wires in response to a control command of the controller; and 
 a frame temperature sensor checking a temperature of a transmission window frame, 
 wherein the temperature of the transmission window frame is controlled by the controller. 
 
     
     
       4. The condensation prevention type transmission window of  claim 1 , wherein the transmission window further comprises:
 air walls protruding from left and right sides of the opposite surfaces thereof to allow injected air to form air layers.